<template>
  <div>
      <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>

    <el-row>
      <el-col>
        <el-button type="primary">添加角色</el-button>
      </el-col>
    </el-row>

    <el-table :data="rolesList" border stripe>
      <!-- 展开列 -->
      <el-table-column type="expand">
        <template slot-scope="scope">

        <!-- for循环显示一级权限 -->
          <el-row :class="['bdbottom','makerCenter',index1 ===0 ? 'bdtop':'']" v-for="(item1,index1) in scope.row.children" :key="item1.id">
            <el-col :span="5">
             <el-tag closable  @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
             <i class="el-icon-caret-right"></i>
            </el-col>
            <el-col :span="19">
              <!-- for循环嵌套显示二级权限 -->
              <el-row :class="['makerCenter',index2 ===0 ?'':'bdtop']" v-for="(item2,index2) in item1.children" :key="item2.id">
                <el-col :span="6">
                  <el-tag type="success" closable  @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>

              <!-- 层层嵌套for循环显示三级权限 -->
                <el-col :span="18">
                  <el-tag
                    closable type="warning" v-for="(item3,index3) in item2.children" :key="item3.id"
                    @close="removeRightById(scope.row,item3.id)">
                    {{item3.authName}}
                  </el-tag>
                </el-col>
              </el-row>
            </el-col>
          </el-row>
        </template>
      </el-table-column>
      <!-- 序数列 -->
      <el-table-column type="index" label="#"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作" prop="">
        <template slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini" >编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini" >删除</el-button>
          <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
        </template>
      </el-table-column>
    </el-table>

  <!-- 分配权限的对话框 -->
  <el-dialog
    title="分配权限"
    :visible.sync="setRightDialogVisble"
    width="50%"
    @close="setRightDialogClose"
  >
    <el-tree
      :data="rightsList"
      :props="treeProps"
      show-checkbox
      node-key="id"
      default-expand-all
      :default-checked-keys="defkeys"
      ref="treeRef"
    ></el-tree>
    <span slot="footer">
      <el-button @click="setRightDialogVisble = false">取 消</el-button>
      <el-button type="primary" @click="allotRights">确 定</el-button>
    </span>

    </el-dialog>

    </el-card>


  </div>
</template>

<script>
export default {
    name:'Roles',
    created(){
      this.getRolesList()
    },
    data() {
      return {
        rolesList:[],
        setRightDialogVisble:false,
        rightsList:[],
        //树形控件的绑定属性
        treeProps:{
          label:'authName',
          children:'children'
        },
        //树形结构中 要默认勾选的 复选框
        defkeys:[],
        roleID:''
      }
    },
    methods:{
      async getRolesList(){
        const {data:res} = await this.$http.get('roles')
        if (res.meta.status !==200) return this.$message.error('获取角色列表失败！')
        this.$message.success('获取角色列表成功！')
        this.rolesList = res.data
      },
      //删除角色权限
      async removeRightById(role,rightId){
        const confirmResult =  await this.$confirm('此操作将永久删除角色权限, 是否继续?', '删除角色权限', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)
        if(confirmResult!== 'confirm') return this.$message.info('取消了删除')
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if(res.meta.status !== 200) return this.$message.error('删除角色权限失败')
        this.$message.success('删除角色权限成功')
        role.children = res.data
      },
      //展示分配权限的对话框
      async showSetRightDialog(role){
        this.roleID = role.id
        const {data:res} = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) return this.$message.error('请求数据失败！')
        this.$message.success('获取用权限数据成功！')
        this.rightsList = res.data
        // console.log(this.rightsList);

        //显示之前，递归获取三界节点的id
        this.getLeafKeys(role,this.defkeys)
        this.setRightDialogVisble = true

      },
      //通过递归的形式获取角色项所有的id，，，并保存到defkeys数组中
      getLeafKeys(node,arr){
        //如果当前节点不包含children属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }
        node.children.forEach(item => {
          this.getLeafKeys(item,arr)
        });
      },
      setRightDialogClose(){
        this.defkeys= [],
        this.roleID=''
      },
      async allotRights(){
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr = keys.join(',')
        const {data:res} = await this.$http.post(`roles/${this.roleID}/rights`,{rids:idStr})
        if(res.meta.status !==200) return this.$message.error('修改角色权限失败！')
        this.$message.success('修改角色权限成功！')
        this.getRolesList()
        this.setRightDialogVisble = false
      }
    }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}
.makerCenter {
  display: flex;
  align-items: center;
}
</style>